solar water heater, pressure ,Elegant,princeliness,household,popular on the worldwide,maintenance free,Al/N/Al-SS/C Solar Water Heater [Stainless steel]--SG-SCHASG-SCHA serials isa kind of solar collector, It used with heat preservation water tank, solar power workstation and the pipe. The solar collector is consisted of super conducting vacuum heat collecting tube and header, so it's of great ...